In High School I was assigned a report on Islam and was quite surprised by what I learned. Islam has more in common with organized crime organizations like the Mafia than any religion. Islam does indeed have a dual set of ethics: One set of ethics for dealings with other muslims and another set of ethics for non-Muslims. Islam does authorized deception to gain an advantage over non-muslims.
Muslims are not here because of mass conversions of Americans but because of a treasonous immigration policy that let thousands of them come here. They have been enemies of Western Civilization for 1,200 years. They invaded Europe and were stopped in 732 by Charles Martel at the battle of Tours, just south of Paris, France. This was 300 years before the first Crusade. After that Muslims continually attacked and enslaved white Europeans through outright war, piracy and kidnapping. Muslims were also heavily involved with Jews in the African slave trade as well.
As recently as 1631, Barbary Pirates from Islamic Algeria attacked Ireland and kidnapped the entire village of Baltimore, Ireland, enslaved them and transported them back to Africa.
http://en.wikipedia.org/wiki/Sack_of_Baltimore
In or about 1803, the infant United States republic had to go to war with the Barbary Pirates to stop their seizure of American ships and kidnapping and enslavement of Americans.
More recently, in the aftermath of WW2 and Indian independence, Muslims in that country touched off a civil war with the Hindu majority that caused 1 million dead and resulted in the partition of India and the creation of the Islamic state of Pakistan. Even today, Pakistan and India are nuclear powers who are poised at each other's throats. Muslims and hindus co-existed for hundreds of years in India, but the minute the British gave independence, the Muslims tried to dominate other Indians. Muslims have always tried to dominate other countries and stamp out or exact tribute from other religions. They are out enemy and sooner or later we're going to have to deal with them. The certainly intend to deal with us.